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Dietary Choline or Trimethylamine N-oxide Supplementation Does Not Influence Atherosclerosis Development in Ldlr-/- and Apoe-/- Male Mice
- Source :
- The Journal of Nutrition. 150:249-255
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Background Choline, an essential nutrient, is required for cell membranes, lipoprotein secretion, and methyl-group metabolism. Recently, it has been proposed that excess dietary choline consumption is metabolized to trimethylamine (TMA) by the gut microbiota; TMA is then oxidized to trimethylamine N-oxide (TMAO) in the liver. Epidemiological studies have clearly shown a positive correlation between plasma TMAO concentrations and cardiovascular events. Furthermore, some studies have shown an association between excess dietary choline, plasma TMAO concentrations, and atherosclerotic lesion size in apoE knockout (Apoe-/-) mice. Objective The aim of this study was to further investigate the relation between dietary choline and atherosclerosis in 2 atherogenic mouse models, the LDL receptor knockout (Ldlr-/-) and Apoe-/- mice. Methods Six feeding trials were performed in Ldlr-/- (40% high-fat diet) and Apoe-/- (unpurified diet) male mice, aged 8-10 wk. Mice randomly received control diet (0.1% choline), or choline- (1% choline), betaine- (0.1% choline and 0.9% betaine), or TMAO- (0.1% choline and 0.12% or 0.2% TMAO) supplemented diet for ≤28 wk. After the dietary intervention, the animals were killed and tissues and blood collected. Aortic atherosclerotic plaque area, plasma lipids, and choline metabolites were quantified. Results In Ldlr-/- mice, dietary supplementation for 8 wk with choline or TMAO increased plasma TMAO concentrations by 1.6- and 4-fold, respectively. After 16 wk, there was a 2-fold increase in plasma TMAO after dietary TMAO supplementation. In Apoe-/- mice, dietary supplementation with choline, betaine, or TMAO for 12 wk did not increase plasma TMAO concentrations. However, choline and TMAO supplementation for 28 wk significantly increased plasma TMAO concentrations by 1.8- and 1.5-fold, respectively. Contrary to predictions, atherosclerotic lesion size was not altered by any of the dietary interventions, irrespective of mouse model. Conclusions In our study, high intakes of dietary choline or TMAO supplementation did not influence atherosclerosis development in Ldlr-/- or Apoe-/- male mice.
- Subjects :
- Male
0301 basic medicine
Apolipoprotein E
medicine.medical_specialty
Medicine (miscellaneous)
Trimethylamine
Trimethylamine N-oxide
030204 cardiovascular system & hematology
Choline
Methylamines
Mice
03 medical and health sciences
chemistry.chemical_compound
Apolipoproteins E
0302 clinical medicine
Betaine
Internal medicine
medicine
Animals
Mice, Knockout
2. Zero hunger
Nutrition and Dietetics
Chemistry
Metabolism
Atherosclerosis
3. Good health
Mice, Inbred C57BL
030104 developmental biology
Endocrinology
Receptors, LDL
Dietary Supplements
LDL receptor
Lipoprotein
Subjects
Details
- ISSN :
- 00223166
- Volume :
- 150
- Database :
- OpenAIRE
- Journal :
- The Journal of Nutrition
- Accession number :
- edsair.doi.dedup.....0ee9f8deaa6789dc6afd064a3543061e